Originally Posted by jfelbab
I'd reach for a paint cleaner (Dupont Prepsol) or a light polish (M205). Even a cleaner/wax would likely remove that stain.
yes you're right, least aggressive method first, but sometimes it's tough if you don't have all the different products handy, that's why I suggest the cheapest alternatives or things that people may already have lying around the house first. OP, M105 is one of the most aggressive compounds out there. It's probably not as aggressive if you use it by hand as opposed to machine, which is why I suggested it (I assume you don't have a machine). I use it on my car by hand to take out nail marks from the door handles where you can't get access by machine. You may be able to get a small 8oz bottle, which should last you quite a long time.
If you want to go less aggressive then M205 or the consumer equivalent, Meguiar's Ultimate Polish is what ppl generally use to follow up M105. Assuming it also takes out the stain, it is better to use that over M105 or the consumer version Meguiars Ultimate Compound, since it got the job done using the least aggressive method. But that's assuming it is aggressive enough to take out the stain. If it isn't, then you have a bottle of M205 that you probably won't use again unless you get a machine, and you have to spend money again buying something more aggressive.
you still might want to order trix and/or iron x
Should should also consider coating it.
Lexus paint is fairly soft and though you won't see the swirls as easily as say a black car, you will eventually get the little orange rust spots as embedded rail/brake dust settles on the car and embeds itself into the paint then rusts.
Even though I drive a black car, I still use iron x annually to get rid of embedded iron. Might do so less often now that my car is coated, but there is still a need for it imo